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Variation of karst spring discharge in the recent five decades as an indicator of global cli{1.te change: A case study at Shanxi, northern China

引用

Science China Earth Sciences 2005年第11期48卷 2001-2010页

作者： guo qinghai1. wang yanxin1. ma teng1.& li luxiu2.1. school of environmental studies, China {1. of geosciences, wuhan 430074, China 2. Office of Water Resource management of Shanxi Province, Taiyuan 030001. China 1. school of {1. studies China University of Geosciences 430074 Wuhan China 2. Office of Water Resource management of Shanxi Province 030001 Taiyuan China

Karst in Shanxi Province is representative of that in northern China, and karst water systems discharge in the form of springs that are among the most important sources for local water supply. Since the 1950s, attenuation has been the major trend of discharge variation of most karst springs at Shanxi. Based on the case study of 7 karst springs including Niangziguan, Xin’an, guozhuang, Shentou, Jinci, Lancun, and Hongshan springs, the discharge variation process of karst springs was divided into natural fluctuation phase and anthropogenic impact phase. Discharge attenuation of the 7 karst springs was controlled mainly by climate and human activities, with their contributions being respectively about 60% and 40%. According to the dif-ference of the effect of climate and human activities for each spring, attenuation modes of spring discharge fall into three types: natural process dominated attenuation type, exploitation induced process dominated attenuation type, and mixed attenuation type. The total restored discharge variation of 7 karst springs matched well with the global air temperature change in 1956―2000, clearly indicating the trend of global warming and aridity in the last several decades, and the analysis of discharge variation processes of karst springs can be used as a new tool for global change studies.

关键词： karst, Shanxi, spring discharge, attenuation, cli{1.te, human activity, global change

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